I've been struggling with recently rediscovered space opera setting that I've created when I was just a teenager. To cut the long story short, it's set thousands of years in the future, somewhere in our galaxy. Humanoid, start trek-type aliens, however exotic they might look, are all considered human off-shots - inbreeding of early colonists, natural and introduced mutations, genetic engineering... it doesn't really matter. Human worlds have been settled for so long most of the people just consider themselves native to their homeworlds.... Now, while it doesn't play a significant part in any of the story lines, I 'm puzzled with the role our good old Mother Earth should play in the setting. There are so many worn-out concepts in scifi, but if I choose one, I want it to be somehow reflecting of the "real"/present world. So tell me, what do you think: 1. A backwater planet is recently discovered to be the cradle of all humanity - like sub-Saharan Africa nowadays, with all the consequences 2. For some times a planet is known to be the home of the very first "modern" civilization - like Iraq nowadays, with all the consequences - but most people doubt it could be the birthplace of the species 3. The homeworld of humanity is completely erased from collective memory and history - much like in Asimov's Foundation - and there is some reason (religious perhaps?) that it's left that way 4. The Earth is known by name and significance throughout history, and it's home to an utopian society - much like in Star Trek 5. Everybody knows about it, and consider it a place of worship and pilgrimage - it's a tomb world, or a temple world - a sort of Holy Land, Mecca or Jerusalem 6. Nobody is sure which planet IS actually Earth - and a number of mostly primitive worlds claim themselves to be the real birthplace of Humanity 7. It's a desert wasteland, radiated, desecrated, depopulated or with sub-human population - but is kept as neutral grounds by the great galactic powers 8. Most of the above combined in some way. 9. Something completely different?